MESON Chess Problem Database

Problem Display
PID: 166952 (b7/8/1pp1B1np/4Np1R/4kq1Q/1pPp1N2/5PPB/2nK4 w - - 0 1)

Onkoud, Abdelaziz

Phenix, 2017

b7/8/1pp1B1np/4Np1R/4kq1Q/1pPp1N2/5PPB/2nK4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh4
      • 2.Sd2#
    • 1...Sxe5
      • 2.Sd2#
      • 2.Qxf4#
    • 1...Se7
      • 2.Qxf4#
    • 1...Sf8
      • 2.Qxf4#
    • 1...Sh8
      • 2.Qxf4#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sd2#
        • 2.Sf6#
      • 1...Qxh4
        • 2.Sd2#
      • 1...Sxh4
        • 2.Sf6#
      • 1...Qg4
        • 2.Sf6#
      • 1...d2!
    • 1.Rxf5?
      • threat
        • 2.Sd2#
      • 1...Sxh4
        • 2.Rxf4#
      • 1...d2
        • 2.Sxd2#
      • 1...Qg4!
    • 1.c4?
      • threat
        • 2.Bxf5#
      • 1...Se7
        • 2.Qxf4#
      • 1...Sxh4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qd4#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qxf3+
        • 2.gxf3#
      • 1...Qxe5
        • 2.Sd2#
      • 1...Qe3
        • 2.Bxf5#
      • 1...Se2
        • 2.Qxd3#
      • 1...c5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_SPINQ(e),XQ(G)::S(F)
    • S(i);N_GUARD::QAR1(G),XQ(e)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);N_SPINQ(e),XQ(G)::S(F)
        • S(i);N_SPINQ(e),XQ(G)::S(H)
        • Q(e);P_PINS(F)::S(H)
      • Refutation
        • P(c);
    • Try
      • R(I);XP(f)
      • Threat
        • S(F)
      • Vars
        • S(i);N_GUARD,N_SPINQ(e),XQ(G)::R1(I),XQ(e)
        • P(c);::S(F),XP(c)
      • Refutation
        • Q(e);P_PINS(F)
    • Try
      • P(E);
      • Threat
        • B(J),XP(f)
      • Vars
        • S(i);N_GUARD::QAR1(G),XQ(e)
      • Refutation
        • S(i);N_SPINQ(e),XQ(G)
  • Actual
    • Q(G);N_PINQ(e)
    • Threat
      • QAR1(G)
    • Vars
      • Q(e);CHECK,N_GUARD::S(F),XQ(e)
      • Q(e);CHECK,OGATE,XS(F)::P(C),XQ(e)
      • Q(e);N_GUARD,XS(H)::S(F)
      • Q(e);N_GUARD::B(J),XP(f)
      • S(a);N_GUARD::QAB1(G),XP(c)
      • P(h);OGATEB::QAB(G),XB(k)
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